<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <!-- import CSS -->
    <link rel="stylesheet" href="https://cdn.staticfile.org/element-ui/2.15.9/theme-chalk/index.css">
    <style>
        .el-menu-vertical-demo:not(.el-menu--collapse) {
            width: 200px;
            min-height: 400px;
        }

    </style>
</head>
<body>
<div id="app">
    <el-container>
        <el-aside width="200px">
            <el-menu default-active="1-4-1" class="el-menu-vertical-demo" @open="handleOpen" @close="handleClose" :collapse="isCollapse">
                <el-submenu index="1">
                    <template slot="title">
                        <i class="el-icon-location"></i>
                        <span slot="title">导航一</span>
                    </template>
                    <el-menu-item-group>
                        <span slot="title">分组一</span>
                        <el-menu-item index="1-1">选项1</el-menu-item>
                        <el-menu-item index="1-2">选项2</el-menu-item>
                    </el-menu-item-group>
                    <el-menu-item-group title="分组2">
                        <el-menu-item index="1-3">选项3</el-menu-item>
                    </el-menu-item-group>
                    <el-submenu index="1-4">
                        <span slot="title">选项4</span>
                        <el-menu-item index="1-4-1">选项1</el-menu-item>
                    </el-submenu>
                </el-submenu>
                <el-menu-item index="2">
                    <i class="el-icon-menu"></i>
                    <span slot="title">导航二</span>
                </el-menu-item>
                <el-menu-item index="3" disabled>
                    <i class="el-icon-document"></i>
                    <span slot="title">导航三</span>
                </el-menu-item>
                <el-menu-item index="4">
                    <i class="el-icon-setting"></i>
                    <span slot="title">导航四</span>
                </el-menu-item>
            </el-menu>
        </el-aside>

        <el-container>
            <el-header>
                <el-radio-group v-model="isCollapse" >
                    <el-link :underline="false" @click="op()"><i class="el-icon-notebook-2" style="color: black;font-size: 30px"></i></el-link>
            </el-radio-group>
            </el-header>
            <el-main>Main</el-main>
        </el-container>

    </el-container>
</div>
</body>
<!--axios-->
<script src="https://cdn.bootcdn.net/ajax/libs/axios/0.21.1/axios.min.js"></script>
<!-- import Vue before Element -->
<script src="https://cdn.staticfile.org/vue/2.6.14/vue.min.js"></script>
<!-- import JavaScript -->
<script src="https://cdn.staticfile.org/element-ui/2.15.9/index.min.js"></script>
<script>
    let v = new Vue({
        el: '#app',
        data: function() {
            return {
                isCollapse: true,
            }
        },
        methods:{
            op(){
                v.isCollapse = !this.isCollapse;
            },
            handleOpen(key, keyPath) {
                console.log(key, keyPath);
            },
            handleClose(key, keyPath) {
                console.log(key, keyPath);
            }
        }
    })
</script>
</html>